82801765 has 4 divisors (see below), whose sum is σ = 99362124. Its totient is φ = 66241408.

The previous prime is 82801739. The next prime is 82801769. The reversal of 82801765 is 56710828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26040609 + 56761156 = 5103^2 + 7534^2 .

It is a cyclic number.

It is not a de Polignac number, because 82801765 - 2¹⁹ = 82277477 is a prime.

It is a super-3 number, since 3×82801765³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82801769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8280172 + ... + 8280181.

It is an arithmetic number, because the mean of its divisors is an integer number (24840531).

Almost surely, 2^82801765 is an apocalyptic number.

It is an amenable number.

82801765 is a deficient number, since it is larger than the sum of its proper divisors (16560359).

82801765 is a wasteful number, since it uses less digits than its factorization.

82801765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16560358.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 82801765 is about 9099.5475162230. The cubic root of 82801765 is about 435.8595151715.

The spelling of 82801765 in words is "eighty-two million, eight hundred one thousand, seven hundred sixty-five".